Twin-cylinder refrigerator



2 sheets-smet 1 W. L. MORRISON TWIN CYLINDER REFRIGERITOR Aug. 7, 1945.

Filed March 18, 1944 Aug 7r1945 \w. l. MORRISON 2,380,987

TWIN CYLINDER REFRIGERATOR Filed March 18, 1944 l2 sheets-'sheet 2 Patented Aug. 7, 1945l jum'rso STATES PATENT ori-"lcs 'rm-crampes mamma Willard L. Morrison. Lake Forest, lll. Application March 18, 1944, Serial $0.521.

' s am (ci. es-im My` invention relates to an improvement in refrigerating devices. i v

Y O ne purpose is to provide a 'refrlgerating and storing unit having a maximum of storage space and taking up a minimum of iloor space.

Another purpose is to provide a refrigeration and storage unit in which a plurality o! storage members are associated.

Another Purpose is to provide a multiple storage'unit in which a pluraiityof separate evap-4 orawrs each surround and circumierentially deiine an open topped storage space.

Another purpose is to provide an improved refrigeration and storage unit having a maximum of storage space and a minimum of supporting structure.

Another purpose is to provide a refrigeration unit in which a plurality of open topped storage mumbers are surrounded by a single exterior w Another purpose is to provide an improved refrigerator assembly in which the evaporator elements not only circumierentially denne the storase space, but serve as the central frame and reinforcement, of the refrigerating cabinet.

Other `purposes will appear from time tol time lin the course ot the speciiication and claims.

I illustrate the invention more or less diagram- {aatically in the Iaccompanying drawings where- Figure 1 isa side elevationt Figureilisasectiononsnenlargedscalealong' thelinel-'Ioil'figurehand Figure3isasectionalongtheline3-8of Figure2.

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mmushmt the' specxnesuon sns Referring to the drawings. Iygen'erally indigcates the supporting surfacev or door 'on which 'laterally outwardly as at l. to receive able compressor-condenser unit. the member I -stopsshortofthelateralextensionl Itmav thebase2,byanys\litablemeansbutlndt practicalandsimpletodowelitasat1,1. 'Ihe memberlcanthusbesuperposedonthebase 2 quickly and easily, and its lateralmovement is prevented by the doweling. The member l is also shown as provided' with depressions l. I. Positioned upon the member I are a, plurality ofevaporator elements generally indicated as A. Bach such element is shown asincluding an inner cylinder l with an integral closed bottom il and a downward projection III extending into one ofthedepressionslinthememberl. Thisisa convenient means for centering and positioning the evaporator and for preventing its lateral movement in relation to the insulating member I. It will be understood, however, that a variety of means may be employed' for holding the evaporator in place. They may, for example, be

cemented to the upper surface. of the member l, and the member 4 may be cemented to theupper surface o! the base 2. The evaporator structure is completed by an outer 'cylinder l2 which extends about the cylinder l and is sealed to it at the top and bottom vas at il, Il.' The two cylinders denne a relatively restricted circumferentially extending space to which a volatile refrigerant is delivered from any suitable compressorcondenser structure mounted on the base extension I and housed within any suitable housing Il, if a' housing is desired. The details of the compressor-condenser unit `do not of themselves form part of thepresent invention, and are not herein shown. It will be understood that the refrigerant is delivered toward the' evaporator units along the delivery pipe l1 which'iorks as at Il. Eaehbranehpassage Il then extends yto any suitable expansion valve structure 2l, the

details of whlchdo not form part of the present' invention. The refrigerant is delivered from each expansion valve Il along a ductl to the interior oi'the evaporator space defined between the 'inner and outer cylinders. I may employ anysuitable means for distributing the refrig- -erant through the evaporator space in such lashion that the entire inner wall'of the inner cylinuder l constitutes a. primary cooling surface. lI

illustrate, for example. a plurality of rods or baities 22- extending vertically between the cylinders and constraining the refrigerant totake s tortuous path from the inlet to the outlet of the evaporator space. .The details vof this balling do net of themselves form part ofv the present invention. It will further be realised that I may tors in my unit. I prefer, howeventhat the evap- 2 2,880,087 A oratorsbexenenuycylindricalsndhaveacled willbexmdentoodthntthemmipmatinnotthe lottngndanopentop. 2l mdicatesanysuitconuolelementvu'iesthotempentmtowhlch ableoutletesjoiningasatuinthesenthestoredmsterinlissubjected. Theloeineraloutletpasageorduct liwhichreturnsto auktion"maybesealedaudooniinerlwithinm ,4 thecompressor-eondenser unit. isanoilpi'ck- 5 upperinmlstingluer. Aboveitmlybepoliuppassasewhichextendsfromthebottomof tionedanysuitabletopcovet,otnheetmotal, eachevporawrtoitsoutlet e 23. Itserves phsticaheetorthenke.' Itmubendvmuseons topreventtheaccumulationofoiltthebottomtomnkeitofplastic. Iahawituhvmgmm of the evaporator. Each expansion valve Il may 'g1-ny tuned gnge a about the top of euch be controlled from any suitable temperature rel0 etongespa, uponwhich seottheremovableeovsponsive elements, 2l, placed near the outlet pls- 'm 'iththeir nobr, sagezlandoonnectedtotheexpanslonnlve llismys'uitablerubberorsynthoticsedinz by any mutable duct Il. member, which receives the downwardly extend- After the evaporators have been positioned as ...mim fwn, ....d.. .F.. ...wmf mmm. mmwmmmmmm mmmmmmmmmmmmm mmm mmmmemm m. mm mmmmdwm mmmdmwmmemmmmmmmm m Wmmm. .m w, mmtmmmmnmmmm ummm www www mm.. .Em mm fvwm ...mmgfmh mmedvmmmmmm .mmmdmmmdmmmmmmwmmd m mmmm m Mmmmmmmm-mmmmm mmmmwmmmwmmmm mmmmmmmm mm @Mmmlww @Mmmm t m.. @my EN i m m smamwmmmwmei.. dmifm, na. .mymmm w. mamme@ wwwwwwwwwmmmmmmm-mimmmmm mmmmmm; www l .m .wwmmmg M imm. r e, n n Mmmmmm.MwwwmmwwwmmmmmmmmmmmmmmmMmmmL wwwmmmm m-mmmmmwmwmwmm www www; www? Tmwmm wwwmmmwwwmwmmmmwmmwmmmmmwmmmmmwmm mm.. www www mmmmmmmmmmwmmm .Hmmm mi i .u um Mw Mw, m mmwmmmmmmmmmwmmmmmmwwwmmmmmmmmmmmmm mmmwmdmm mmmmmm w u mm mmumtmm mm .3.; m m d n# mmmmwmmmwww@mmmmmmmwmmmwmmmmmmmmwmmmmmmmw stituting an outer cabinet wall, said evaporator units constituting the soie internal ment for said cabinet' wall.

3. In a refrigeratingl and storage structure, a base, a plurality 'of generally cylindrical open topped evaporator storage umts. said base having rounded ends, each of. said ends being generally concentric with the walls of one of said evaporator units, an outer housing of relatively thin flexible material surrounding said base and reinforcesaid evaporator units, a unitary -body of insulating material upon said base, upon which the evaporator units rest, a massof relatively loose insulation tamped into the space between said l housing and said evaporator units, and between said units, inlet and outlet ducts for said units, embedded in said insulation, a compressor-conhousing and said evaporator units, and between said units, inlet and outlet ducts for said units,

denser unit in circuit with said evaporator units,

said outer housing having longitudinally extending side portions connecting said arcuate end portions, and reinforcing means for said longitudinally extending side portions. adapted to prevent outward bulging,`and tension means extending betweenl said reinforcing means for the opposite sides of said housing, 'said outer housing constituting an outer cabinet "wall, said evaporator units constituting the sole internal,

reinforcement for said cabinet Wall.

4. In a. refrigerating and storage structure, a base, a plurality of generally cylindrical open topped evaporator storage units, said b ase having roundedends, each of said ends being generally concentric with the walls of one of said evaporator units, an outer housing of relatively thin flexible material surrounding said base and-- said evaporator units, a unitary body yof insulating material upon saidbase, upon which the embedded in said insulation,` a compressor-condenser unit in circuit with said evaporator units,

said outer housing having longitudinally extending side portions connecting' said arcuate end iportions, and connecting, positioning means extending between said evaporator units, said outer housing constituting an outer cabinet wall, said vevaporator units constituting the sole internal reinforcement for said cabinet wall.

' 5. In a refrigerating and storage structure, a base, a plurality of generally cylindrical open topped evaporator storage units, said base having rounded ends, each of vsaid ends being generally'concentric with the walls of one of said evaporator units, an outer housing of relatively thin flexible material surrounding said base and evaporator units rest, a mass of relatively loose said evaporator units. a'unitary body of insulating material upon said base, upon which the evaporator units rest, a mass of relatively loose insulation tamped into the space between said housing and said evaporator units, and between 'said units, inlet and outlet ducts for said units,

WILLARD L. MORRISON.

insulation tamped into the space between said' 

